6SN7 pin 4 signal input

[celestar32]

I noticed the driver tube 6SN7 signal input always connect to pin 4. Any difference if connect to pin 1? Thanks for clarification.

 

[rayma]

the driver tube 6SN7 signal input always connect to pin 4. Any difference if connect to pin 1?

That's a dual triode, so there are two separate active devices in one envelope, each with
its own grid, plate, and cathode. You can use either of the devices for any particular function.

 

[celestar32]

That's a dual triode, so there are two separate active devices in one envelope, each with
its own grid, plate, and cathode. You can use either of the devices for any particular function.

Thanks for reply. If driver circuit designed mainly for only pin 4 input or doesn't matter and can connect pin 1 or 4?

 

[rayma]

If driver circuit designed mainly for only pin 4 input or doesn't matter and can connect pin 1 or 4?

Can you post the schematic? You can use either section if the plate, grid, and cathode
of the chosen section are all properly connected (and the filament also).

 

[BinaryMike]

The selection of triode #1 vs triode #2 is purely a function of physical circuit layout. This is true for almost all twin triodes. The 6DJ8 is one of the rare exceptions, because its two sections have different heater/cathode insulation ratings.

 

[celestar32]

Can you post the schematic? You can use either section if the plate, grid, and cathode
of the chosen section are all properly connected (and the filament also).

This is the circuit by JE Labs.

 

[rayma]

This is the circuit by JE Labs.

So you want to swap the two sections of the driver tube? Should be ok.
Be careful of the pin numbering, it's a mess.

 

[celestar32]

So you want to swap the two sections of the driver tube? Should be ok.
Be careful of the pin numbering, it's a mess.

1 & 4 input signal, 2 & 5 is anode plate , 3 & 6 is cathodes and lastly 7 & 8 is heater filaments. This should be right.

 

[rayma]

1 & 4 input signal, 2 & 5 is anode plate , 3 & 6 is cathodes and lastly 7 & 8 is heater filaments.

Yes, at least it's hard to get the filament wrong.